Power supply system and method for direct-current quick charging station of electric vehicle and quick charging station

Abstract

The invention provides a power supply system and method for a direct-current fast charging station of an electric vehicle and the fast charging station, and the power supply system comprises a communication module which is used for obtaining the power capacity of a transformer and the output power of each charging pile; the data processing module is used for obtaining the total charging power according to the output power of each charging pile; the judgment module is used for judging whether the total charging power is greater than the power capacity of the transformer or not and outputting a judgment result; and the control module is used for adjusting the allowable output power of each charging pile based on the electric power capacity of the transformer and the judgment result so as to meet the load management of the charging station. The allowable output power of the charging pile is adjusted according to the electric power capacity of the transformer, and the design capacity of the transformer is reduced while continuous charging of the electric vehicle is met, so that the construction cost of the whole charging station is greatly reduced and saved.

Description

Technical Field

[0001] The present application belongs to the technical field of charging power supply, and relates to a DC fast charging station for electric vehicles, and in particular to a power supply system, method and fast charging station for a DC fast charging station for electric vehicles. Background Art

[0002] The power level of high-power DC fast charging piles for electric vehicles is getting higher and higher, from tens of kilowatts to hundreds of kilowatts, or even hundreds of kilowatts. The power consumption characteristics of DC fast charging stations for electric vehicles are high peak power, but the maintenance time is not long. Most of the time, they operate at a lower power level, but they must be designed according to the maximum peak power, which causes a great degree of waste.

[0003] When the charging piles of an electric vehicle charging station are actually running, it is often difficult to reach peak power. This can only happen when all charging piles are charging normally and at maximum power. In fact, the utilization rate of each charging pile is very low, and the time when all piles in a station are in a charging state at the same time is even less, and the time when they are charging at maximum power at the same time is even less. However, if the design capacity of the input transformer is reduced for this reason, when all piles are running at the same time, the required power will exceed the transformer capacity, thereby triggering overload protection and causing a power outage in the entire station.

[0004] Therefore, it is necessary to establish an operating mechanism so that when the input transformer capacity is less than the total power of the charging piles in the station, the entire station can still operate reliably. Summary of the invention

[0005] The purpose of the present application is to provide a power supply system, method and fast charging station for electric vehicle DC fast charging stations, which are used to solve the problem of power outage caused by overload in electric vehicle fast charging stations in the prior art.

[0006] In a first aspect, the present application provides a power supply system for a DC fast charging station for electric vehicles, the system comprising: a communication module for obtaining the power capacity of the transformer and the output power of each charging pile; a data processing module for obtaining the total charging power according to the output power of each charging pile; a judgment module for judging whether the total charging power is greater than the power capacity of the transformer and outputting the judgment result; a control module for adjusting the allowable output power of each charging pile based on the power capacity of the transformer and the judgment result to meet the load management of the charging station.

[0007] In an implementation manner of the first aspect, the communication module polls to obtain the power capacity of the transformer and the output power of each of the charging piles according to a preset time.

[0008] In an implementation of the first aspect, the data processing module sums the output power of each of the charging piles to obtain the total charging power.

[0009] In an implementation of the first aspect, the adjustment of the allowable output power of each charging pile based on the power capacity of the transformer and the judgment result includes: when the total charging power is greater than the power capacity of the transformer, adjusting the allowable output power of each charging pile according to the charging demand of each charging pile to meet the load management of the charging station; when the total charging power is not greater than the power capacity of the transformer, adjusting the allowable output power of each charging pile to the rated output power.

[0010] Furthermore, adjusting the allowable output power of each charging pile according to the charging demand of each charging pile includes: arranging the output power of each charging pile in order; reducing the allowable output power of each charging pile in turn according to a preset ratio according to the arrangement order, so that the total charging power is less than the power capacity of the transformer.

[0011] Furthermore, the output power of each of the charging piles is arranged in order from large to small.

[0012] In an implementation of the first aspect, adjusting the allowable output power of each charging pile according to the charging demand of each charging pile includes: uniformly limiting the allowable output power of each charging pile according to the working status of each charging pile so that the total charging power is less than the power capacity of the transformer.

[0013] Furthermore, the allowed output power of each charging pile in the power supply state is reduced on average.

[0014] In a second aspect, the present application provides a method for powering a DC fast charging station for electric vehicles, the method comprising: obtaining the power capacity of the transformer and the output power of each charging pile; obtaining the total charging power based on the output power of each charging pile; judging whether the total charging power is greater than the power capacity of the transformer, and outputting the judgment result; adjusting the allowable output power of each charging pile based on the power capacity of the transformer and the judgment result to meet the load management of the charging station.

[0015] In an implementation of the second aspect, the allowable output power of each charging pile is adjusted based on the power capacity of the transformer and the judgment result to meet the load management of the charging station, including: when the total charging power is greater than the power capacity of the transformer, according to the charging requirements of each charging pile, adjusting the allowable output power of each charging pile to meet the load management of the charging station; when the total charging power is not greater than the power capacity of the transformer, adjusting the allowable output power of each charging pile to the rated output power.

[0016] In an implementation of the second aspect, adjusting the allowable output power of each charging pile according to the charging demand of each charging pile includes: arranging the output power of each charging pile in order; reducing the allowable output power of each charging pile in turn according to a preset ratio according to the arrangement order, so that the total charging power is less than the power capacity of the transformer.

[0017] In an implementation of the second aspect, adjusting the allowable output power of each charging pile according to the charging demand of each charging pile includes: uniformly limiting the allowable output power of each charging pile according to the working status of each charging pile so that the total charging power is less than the power capacity of the transformer.

[0018] In a third aspect, the present application provides an electric vehicle DC fast charging station, which includes the electric vehicle fast charging station power supply system, DC power supply and charging pile as described in any one of the first aspect of the present application; the electric vehicle DC fast charging station power supply system is respectively connected to the DC power supply and the charging pile, for load management of the electric vehicle DC fast charging station; the DC power supply is connected to the charging pile to provide power to the charging pile.

[0019] In an implementation of the third aspect, the DC power supply includes a transformer, and the electric vehicle DC fast charging station power supply system includes a communication module, and the communication module is also used to realize communication between the transformer and the charging pile to adjust the load of the electric vehicle DC fast charging station according to the power capacity of the transformer.

[0020] As described above, the electric vehicle DC fast charging station power supply system, method and fast charging station described in this application have the following benefits:

[0021] First, the present application establishes a communication channel between the transformer and each charging pile through a communication module to obtain the output power of each charging pile and the power capacity of the transformer in real time, so as to quickly determine the derating scheme of the allowable output power of each charging pile.

[0022] Second, the present application adjusts the allowable output power of the charging pile according to the power capacity of the transformer, thereby reducing the design capacity of the transformer while meeting the continuous charging requirements of the electric vehicle, thereby significantly reducing the construction cost of the entire charging station. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Shown is a schematic diagram of the structure of the electric vehicle DC fast charging station power supply system described in an embodiment of the present application.

[0024] Figure 2 Shown is a schematic diagram of the working process of the control module described in an embodiment of the present application.

[0025] Figure 3 Shown is a schematic diagram of the workflow of the multiple control modules described in an embodiment of the present application.

[0026] Figure 4 Shown is a schematic diagram of a power supply method for a DC fast charging station for electric vehicles as described in an embodiment of the present application.

[0027] Figure 5 Shown is a schematic diagram of the structure of a DC fast charging station for electric vehicles as described in an embodiment of the present application.

[0028] Figure 6 Shown is a schematic diagram of the structure of a DC fast charging station for electric vehicles as described in an embodiment of the present application.

[0029] Component number description

[0030] 100 Electric vehicle DC fast charging station power supply system

[0031] 101 Communication Module

[0032] 102 Data processing module

[0033] 103 Judgment module

[0034] 104 Control Module

[0035] 1000 Electric Vehicle DC Fast Charging Stations

[0036] 1001 DC Power Supply

[0037] 10011 Transformer

[0038] 1002 Charging Stations DETAILED DESCRIPTION

[0039] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0040] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application, and thus the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0041] The power consumption characteristics of electric vehicle DC fast charging stations are high peak power, but the maintenance time is not long. Most of the time it operates at a lower power level, but it must be designed according to the maximum peak power, which causes a great deal of waste.

[0042] For example, if a charging station has 10 120kW charging piles, the input transformer capacity of the entire station must be configured as 10*120kW / PF / Eff=1200kVA / (PF*Eff), where PF is the input side power factor and Eff is the efficiency of the charging station. Even under the most ideal conditions, that is, PF=1, Eff=100%, the required total capacity must reach 1200kVA.

[0043] However, in actual operation, such peak power is difficult to achieve. It can only happen when all 10 piles are charging and charging at maximum power. In fact, the current single pile utilization rate is only about 10%, that is, each pile is only in charging state for about 10% of the time, and the time when all piles in a station are in charging state at the same time is even less, and the time when they are charging at maximum power at the same time is even less. However, if the design capacity of the input transformer is reduced for this reason, when all piles are running at the same time, the required power will exceed the transformer capacity, thereby triggering overload protection and causing power outages in the entire station.

[0044] Therefore, it is necessary to establish an operating mechanism so that when the input transformer capacity is less than the total power of the charging piles in the station, the entire station can still operate reliably.

[0045] The embodiments of the present application provide a power supply system, method and fast charging station for a DC fast charging station for electric vehicles. By adjusting the allowable output power of the charging pile according to the power capacity of the transformer, the design capacity of the transformer can be reduced while satisfying the continuous charging of the electric vehicle, thereby significantly reducing the construction cost of the entire charging station.

[0046] The following will be combined Figures 1 to 6 The principles and implementation methods of the electric vehicle DC fast charging station power supply system, method and fast charging station described in this application are elaborated in detail.

[0047] See also Figure 1 , showing the electric vehicle DC fast charging station power supply system 100 described in an embodiment of the present application.

[0048] like Figure 1As shown, the electric vehicle DC fast charging station power supply system 100 described in this embodiment includes: a communication module 101, a data processing module 102, a judgment module 103, and a control module 104; wherein, the communication module 101 is used to obtain the power capacity of the transformer and the output power of each charging pile; the data processing module 102 is used to obtain the total charging power according to the output power of each charging pile; the judgment module 103 is used to judge whether the total charging power is greater than the power capacity of the transformer, and output the judgment result; the control module 104 is used to adjust the allowable output power of each charging pile based on the power capacity of the transformer and the judgment result to meet the load management of the charging station.

[0049] Specifically, the communication module 101 polls to obtain the power capacity of the transformer and the output power of each charging pile according to a preset time.

[0050] It should be noted that the communication module 101 needs to obtain real-time data such as voltage, current, power, etc. of each charging pile, and transmit the above data to each module of the electric vehicle DC fast charging station power supply system 100, so as to summarize and analyze the above data and determine whether load management is needed.

[0051] Specifically, according to the current general protection mechanism, when the transformer is overloaded by 200%, the protection will cut off the circuit within 10 to 20 seconds. That is to say, after a 200% overload occurs, as long as the load management mechanism can reduce the load to a normal range within 10 seconds, circuit tripping can be avoided.

[0052] Preferably, according to the number of charging piles corresponding to the transformer, the power capacity of the transformer and the output power of each charging pile are queried and obtained preferably once every 0.1 seconds.

[0053] Specifically, the data processing module 102 sums the output power of each charging pile to obtain the total charging power.

[0054] In one embodiment, adjusting the allowable output power of each charging pile based on the power capacity of the transformer and the judgment result includes: when the total charging power is greater than the power capacity of the transformer, adjusting the allowable output power of each charging pile according to the charging demand of each charging pile to meet the load management of the charging station; when the total charging power is not greater than the power capacity of the transformer, adjusting the allowable output power of each charging pile to the rated output power.

[0055] Specifically, Figure 2 As shown, according to the charging demand of each charging pile, the allowable output power of each charging pile is adjusted, including: arranging the output power of each charging pile in sequence; reducing the allowable output power of each charging pile in turn according to a preset ratio according to the arrangement order, so that the total charging power is less than the power capacity of the transformer.

[0056] Preferably, the output power of each charging pile is arranged in order from large to small.

[0057] Specifically, the output power of each charging pile is arranged in order from large to small. In order to improve the effect of load allocation, the charging piles with large output power are given priority in being allowed to have their output power derated, so as to minimize the number of charging piles that need to have their output power derated, thereby achieving fast and efficient load management.

[0058] It should be noted that the allowable output power is adjusted according to the preset ratio and can be adjusted according to actual needs.

[0059] In another embodiment, if Figure 3 As shown, according to the charging demand of each charging pile, adjusting the allowable output power of each charging pile includes: according to the working state of each charging pile, uniformly limiting the allowable output power of each charging pile so that the total charging power is less than the power capacity of the transformer.

[0060] Specifically, the allowed output power of each charging pile in the power supply state is reduced on average.

[0061] Specifically, the portion of the total charging power that exceeds the power capacity of the transformer is used as the total derating requirement for the output power of each charging pile. According to the current working status of each charging pile, the allowable output power of the charging piles that are charging electric vehicles is uniformly limited to ensure that the total charging power is not greater than the power capacity of the transformer.

[0062] It should be noted that it should be understood that the division of the above modules is only a division of logical functions. In actual implementation, they can be fully or partially integrated into one physical entity, or they can be physically separated. And these modules can all be implemented in the form of software called by processing elements; they can also be all implemented in the form of hardware; some modules can also be implemented in the form of software called by processing elements, and some modules can be implemented in the form of hardware. For example, the x module can be a separately established processing element, or it can be integrated in a chip of the above-mentioned device for implementation. In addition, it can also be stored in the memory of the above-mentioned device in the form of program code, and called and executed by a processing element of the above-mentioned device. The implementation of other modules is similar. In addition, these modules can be fully or partially integrated together, or they can be implemented independently. The processing element described here can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each module above can be completed by an integrated logic circuit of hardware in the processor element or instructions in the form of software.

[0063] For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as one or more application specific integrated circuits (ASIC), or one or more microprocessors (DSP), or one or more field programmable gate arrays (FPGA). For another example, when a module is implemented in the form of a processing element scheduling program code, the processing element may be a general-purpose processor, such as a central processing unit (CPU) or other processor that can call program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0064] See also Figure 4 , showing the power supply method of the electric vehicle DC fast charging station described in the embodiment of the present application.

[0065] like Figure 4 As shown, the electric vehicle DC fast charging station power supply method described in the embodiment of the present application includes:

[0066] Step S1, obtaining the power capacity of the transformer and the output power of each charging pile.

[0067] Specifically, the power capacity of the transformer and the output power of each charging pile are obtained by polling according to a preset time.

[0068] Preferably, according to the number of charging piles corresponding to the transformer under normal circumstances, the power capacity of the transformer and the output power of each charging pile are queried and obtained once every 0.1 seconds.

[0069] It should be noted that while obtaining the output power of each charging pile, it is also necessary to obtain the voltage, current, and other real-time data of each charging pile.

[0070] Step S2: Obtain the total charging power according to the output power of each charging pile.

[0071] Specifically, the output power of each charging pile is summarized to obtain the total charging power.

[0072] Step S3: determine whether the total charging power is greater than the power capacity of the transformer, and output the determination result.

[0073] Specifically, the total charging power is compared with the power capacity of the transformer. When the total charging power is greater than the power capacity of the transformer, the judgment result of determining to perform load management is output, and the difference between the total charging power and the power capacity of the transformer is output at the same time.

[0074] Step S4: adjusting the allowable output power of each charging pile based on the power capacity of the transformer and the judgment result to meet the load management of the charging station.

[0075] Specifically, when the total charging power is greater than the power capacity of the transformer, the allowable output power of each charging pile is adjusted according to the charging demand of each charging pile to meet the load management of the charging station; when the total charging power is not greater than the power capacity of the transformer, the allowable output power of each charging pile is adjusted to the rated output power.

[0076] In one embodiment, the allowable output power of each charging pile is adjusted according to the charging demand of each charging pile, including: arranging the output power of each charging pile in order; reducing the allowable output power of each charging pile in turn according to a preset ratio according to the arrangement order, so that the total charging power is less than the power capacity of the transformer.

[0077] Specifically, the output power of each charging pile is arranged in order from large to small. In order to improve the effect of load allocation, the charging piles with large output power are given priority in being allowed to have their output power derated, so as to minimize the number of charging piles that need to have their output power derated, thereby achieving fast and efficient load management.

[0078] In another embodiment, the allowable output power of each charging pile is adjusted according to the charging demand of each charging pile, including: according to the working status of each charging pile, uniformly limiting the allowable output power of each charging pile so that the total charging power is less than the power capacity of the transformer.

[0079] Specifically, the allowed output power of each charging pile in the power supply state is reduced on average.

[0080] Specifically, the portion of the total charging power that exceeds the power capacity of the transformer is used as the total derating requirement for the output power of each charging pile. According to the current working status of each charging pile, the allowable output power of the charging piles that are charging electric vehicles is uniformly limited to ensure that the total charging power is not greater than the power capacity of the transformer.

[0081] It should be noted that the protection scope of the electric vehicle DC fast charging station power supply method described in the present application is not limited to the execution order of the steps listed in this embodiment, and all solutions implemented by adding, reducing or replacing steps in the prior art based on the principles of the present application are included in the protection scope of the present application.

[0082] See also Figure 5 , showing the electric vehicle DC fast charging station described in the embodiment of the present application.

[0083] like Figure 5 As shown, the electric vehicle DC fast charging station 1000 includes: an electric vehicle DC fast charging station power supply system 100, a DC power supply 1001 and a charging pile 1002 of any embodiment of the present application; wherein the power supply system electric vehicle DC fast charging station power supply system 100 is respectively connected to the DC power supply 1001 and the charging pile 1002, for load management of the electric vehicle DC fast charging station 1000; the DC power supply 1001 is connected to the charging pile 1002 to provide power to the charging pile 1002.

[0084] Specifically, the DC power supply 1001 includes a transformer 10011, and the electric vehicle DC fast charging station power supply system 100 includes a communication module 101. The communication module 101 is also used to realize communication between the transformer 10011 and the charging pile 1002, and between the charging pile 1002 and the electric vehicle being charged, so as to adjust the load of the electric vehicle DC fast charging station 1000 according to the power capacity of the transformer 10011.

[0085] Specifically, in an actual embodiment, if Figure 6 As shown, the electric vehicle DC fast charging station of the present application includes 10 120kW charging piles 1002. In order to optimize the capacity design of the transformer 10011, after predicting and analyzing the actual operating conditions, the capacity of the transformer 10011 is designed to be 600kW. According to the current general protection mechanism, when the transformer 10011 is overloaded by 200%, the protection will cut off the circuit within 10 to 20 seconds. That is to say, after a 200% overload occurs, as long as the load management mechanism can reduce the load to a normal range within 10 seconds, circuit tripping can be avoided.

[0086] The communication circuit on the transformer 10011 side is the host, and the communication on the charging pile 1002 side is the slave. The host polling method is adopted. When an overload occurs, the overall power can be reduced to within the rated value within several communication cycles. The communication cycle can be set to once every 0.1 seconds. For a charging station with 10 charging piles 1002, it can ensure that the power is adjusted to below the rated value within 1 second.

[0087] The descriptions of the processes or structures corresponding to the above-mentioned figures have different emphases. For parts that are not described in detail in a certain process or structure, please refer to the relevant descriptions of other processes or structures.

[0088] In summary, compared with the prior art, the electric vehicle DC fast charging station power supply system, method and fast charging station of the present application, first, the present application establishes a communication channel between the transformer and each charging pile through a communication module, so as to obtain the output power of each charging pile and the power capacity of the transformer in real time, so as to quickly determine the derating scheme of the allowable output power of each charging pile. Second, the present application adjusts the allowable output power of the charging pile according to the power capacity of the transformer, while meeting the continuous charging of the electric vehicle, so as to reduce the design capacity of the transformer, thereby greatly reducing and saving the construction cost of the entire charging station. Therefore, the present application effectively overcomes the various shortcomings of the prior art and has a high industrial utilization value.

[0089] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A DC fast charging station power supply system for electric vehicles, characterized in that: The system comprises: Communication module, used to obtain the power capacity of the transformer and the output power of each charging pile; A data processing module, used to obtain the total charging power according to the output power of each charging pile; A judgment module, used to judge whether the total charging power is greater than the power capacity of the transformer, and output a judgment result; The control module is used to adjust the allowable output power of each charging pile based on the power capacity of the transformer and the judgment result to meet the load management of the charging station.

2. The electric vehicle DC fast charging station power supply system according to claim 1, characterized in that: The communication module polls to obtain the power capacity of the transformer and the output power of each charging pile according to a preset time.

3. The electric vehicle DC fast charging station power supply system according to claim 1, characterized in that: The data processing module sums the output power of each charging pile to obtain the total charging power.

4. The electric vehicle DC fast charging station power supply system according to claim 1, characterized in that: The adjusting the allowable output power of each charging pile based on the power capacity of the transformer and the judgment result includes: When the total charging power is greater than the power capacity of the transformer, the allowable output power of each charging pile is adjusted according to the charging demand of each charging pile to meet the load management of the charging station; When the total charging power is not greater than the power capacity of the transformer, the allowable output power of each charging pile is adjusted to the rated output power.

5. The electric vehicle DC fast charging station power supply system according to claim 4, characterized in that: The step of adjusting the allowable output power of each charging pile according to the charging demand of each charging pile comprises: Arrange the output power of each of the charging piles in order; The allowed output power of each charging pile is reduced in turn according to a preset ratio according to the arrangement order, so that the total charging power is less than the power capacity of the transformer.

6. The electric vehicle DC fast charging station power supply system according to claim 5, characterized in that: The output power of each charging pile is arranged in order from large to small.

7. The electric vehicle DC fast charging station power supply system according to claim 4, characterized in that: The step of adjusting the allowable output power of each charging pile according to the charging demand of each charging pile comprises: According to the working status of each charging pile, the allowable output power of each charging pile is uniformly limited so that the total charging power is less than the power capacity of the transformer.

8. The electric vehicle DC fast charging station power supply system according to claim 7, characterized in that: The allowed output power of each charging pile in the power supply state is reduced on average.

9. A method for powering a DC fast charging station for electric vehicles, characterized in that: The method comprises: Obtain the power capacity of the transformer and the output power of each charging pile; Obtaining a total charging power according to the output power of each charging pile; Determine whether the total charging power is greater than the power capacity of the transformer, and output the determination result; The allowable output power of each charging pile is adjusted based on the power capacity of the transformer and the judgment result to meet the load management of the charging station.

10. The electric vehicle DC fast charging station power supply method according to claim 9, characterized in that: The adjusting the allowable output power of each charging pile based on the power capacity of the transformer and the judgment result to meet the load management of the charging station includes: When the total charging power is greater than the power capacity of the transformer, the allowable output power of each charging pile is adjusted according to the charging demand of each charging pile to meet the load management of the charging station; When the total charging power is not greater than the power capacity of the transformer, the allowable output power of each charging pile is adjusted to the rated output power.

11. The electric vehicle DC fast charging station power supply method according to claim 10, characterized in that: The step of adjusting the allowable output power of each charging pile according to the charging demand of each charging pile comprises: Arrange the output power of each of the charging piles in order; The allowed output power of each charging pile is reduced in turn according to a preset ratio according to the arrangement order, so that the total charging power is less than the power capacity of the transformer.

12. The electric vehicle DC fast charging station power supply method according to claim 10, characterized in that: The step of adjusting the allowable output power of each charging pile according to the charging demand of each charging pile comprises: According to the working status of each charging pile, the allowable output power of each charging pile is uniformly limited so that the total charging power is less than the power capacity of the transformer.

13. A DC fast charging station for electric vehicles, characterized in that: The electric vehicle DC fast charging station comprises the electric vehicle DC fast charging station power supply system, DC power supply and charging pile according to any one of claims 1 to 8; The electric vehicle DC fast charging station power supply system is connected to the DC power supply and the charging pile respectively, and is used to perform load management on the electric vehicle DC fast charging station; The DC power supply is connected to the charging pile to provide power to the charging pile.

14. The electric vehicle DC fast charging station according to claim 13, characterized in that: The DC power supply includes a transformer.

15. The electric vehicle DC fast charging station according to claim 14, characterized in that: The electric vehicle DC fast charging station power supply system includes a communication module, and the communication module is also used to realize communication between the transformer and the charging pile to adjust the load of the electric vehicle DC fast charging station according to the power capacity of the transformer.

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